podesta emails
Top adviser to Hillary Clinton, John Podesta, said Tuesday that Donald Trump's close ally Roger Stone probably knew of the WikiLeaks hack as early as August. CHIP SOMODEVILLA/GETTY IMAGES

President Donald Trump posted a Twitter message Friday that "everyone" at the G20 summit in Hamburg, Germany, was talking about John Podesta, the former chairman of Hillary Clinton's presidential campaign. Amid an investigation into Russia's potential interference in the 2016 election, Trump's comments have drawn increased interest since the hacking of Podesta's personal email account may have contributed to Trump's victory over Clinton.

"Everyone here is talking about why John Podesta refused to give the DNC server to the FBI and the CIA. Disgraceful!" the president tweeted before his meeting with world leaders.

Podesta's emails were disseminated through Wikileaks starting Oct. 7, 2016, one month before the election. The Washington Times reported Wednesday that federal investigators were not able to obtain the server in question.

Sen. Lindsey Graham of South Carolina raised questions to the conservative newspaper about why the DNC hasn't allowed investigators to look at Podesta's server, a key piece of evidence to determine who hacked the server.

"I want to find out from the company [that] did the forensics what their full findings were," Graham told the Washington Times.

The emails contained controversial campaign strategies about the Clinton campaign and resulted in a variety of debunked conspiracy theories including "Pizzagate," which alleged that code words in the emails pointed to a pedophile and sex trafficking ring at the pizza parlor Comet Ping Pong in Washington, D.C.

The American security firm CrowdStrike determined that the hacks were the result of a Russian cyber attack and Podesta himself blamed the hack on the Russians.

"I’ve been involved in politics for nearly five decades," Podesta told reporters in October. "This definitely is the first campaign that I’ve been involved with in which I’ve had to tangle with Russian intelligence agencies ... who seem to be doing everything that they can on behalf of our opponent."

Clinton blamed the hacks and dissemination of Podesta's emails as contributing factors to her election loss in October, as well as former FBI Director James Comey's letter to Congress to reopen an investigation.

"I was on the way to winning until the combination of Jim Comey’s letter on Oct. 28 and Russian WikiLeaks raised doubts in the minds of people who were inclined to vote for me but got scared off — and the evidence for that intervening event is, I think, compelling [and] persuasive," Clinton said in May.

Trump has consistently doubted claims that Russia interfered with the election and reiterated his stance in Warsaw, Poland, a day before the G20 summit.

"I think it very well could be Russia but I think it could very well have been other countries," Trump said during a news conference. "I think a lot of people interfere."